Bleaching liquid and process of manufacturing same



@EFF HQEEQ RAUL EARNES'I NELSQN, OF RED WIN (3-, MINNES0TA.'

Letiltfiwa 13o Drawing.

- Same, of which the following is a specification is to provide a simple process or method I of producing the-liquid, which liquid may be used almost with impunity in connection with the most delicate linen, which is very mild, has good bleaching ,and watersoftening qualities, may be used by the housewife or laundress in doing the wash at home with an electric or other washing machine or the like, or in fact in any other way, without injury to the most delicate cloth or linen and which bleaching liquid though mild will also remove nearly all stains including ink and iodine without injury, to the fabric.

Bleaching liquid is generally or usually produced by mixing-or combining caustic lime, soda, carbonate or pure sodium carbonate with some substance containing and adapted to free chlorine, so that the latter is absorbed with said caustic lime or soda, together with water, as representedby the following formulas:

CaC0a+2Clg+XHzO=CO+2HC10+CaC1i+(X-l)HO,

Ca0+2HC1O+CaClz+(X-1)H2O= gggjj hxmo. In producing Javelle water, bleaching powder or chloride of lime is treated with potassium carbonate, but generally results in improper bleaching qualities and is not sufficiently mild to permit use thereof at home by the housewife or laundress, in the usual process of washing 'machine or the like without serious injury to fabrics. The reaction is'represented as follows In accordance with the present invention, the bleach is made of one or both of the following limes, namely, chloride of lime or chlorinated lime, this chloride carrymt l lll Specification of Letters latent.

Patented Apr. 25, 1922.

Application filed May 3, 1921. .Serial No. 466,602.

ing chlorine gases and being combined with sodium carbonate, in lieu of caustic soda or pure sodium carbonate. To produce 30 gallons or rather 28 gallons allowing two gallons for settling, the following formula is used and it has been found to be very economical and to produce a very mild and desirable bleach: p

In a 30 gallon jar is placed or poured two gallons of'cold water, to which five pounds of chloride of lime or chlorinated lime is added, the mixture being stirred until well dissolved. Then add 10 pounds of washing soda, or sodium carbonate and mixwell, subsequently adding hot water until the solution in the jar is warm, after which the jar is filled with' cold water and'allowed to set until the mixture is settled. The solution thus pro-. duced is a very good and eificient'bleach and so mild it can be used by the housewife where the washing is done at home either in an electric washing machine or the like, or in any other way without possible injury to the most-delicate linen. Furthermore, although it is mild it removes nearly all stains from clothes-without injury to the fabric.

In the addition of two or three gallons of cold water to five pounds of chloride of lime, after which the same is thoroughly stirred to dissolve the lime, a thick paste is produced by the addition of the Washing soda, so that all lumps are dissolved and avoided by bringing the hot Water into the solution, the temperature is raised to about from 170 to 180 and when the temperature rises the solution becomes pink due to impurities in which condition it is an effective soft bleach and serves as a Water softener. It has been found in practice that if the temperature is not brought up to over 120, it may break and turn green and will not act as a water softener or bleach which is useless, a hard bleach being thus produced. By the time the hot water is added to bring the temperature up to 180, the jar is about one-half full so securing more strength from both ingredients. In using the bleach, the housewife will have a chemical which will be of great assistance as it is not only a practical bleach, but will remove fruit stains and many other stains from all cotton goods while at the same time being so mild as to prevent injury to the 'fabric, as well as softening the water. This is due to the fact that the washing soda is a water softener. The bleach is adapted tobe used in the suds or soapy water in the tub or washing machine, and will not injure cotton or linen fabrics of a delicate charac: ter. run from one goods to another and is a positive bleacher of cotton and linen goods.

In addition, a further step may be employed in thatafter making up the bleach there is added thereto a small quantity, preferably about 4 oz. of sodium bisulphite and a small quantity, preferably about 4 oz. of acetic acid which is stirred thoroughly into the bleaching liquor or mixture. By adding these two chemicals, it is possible to take out or remove ink and iodine stalns or the like from fabrics without changing the water softening qualitiesof the roduct as before produced. It will also asslst in the removal of fruit stains.

In view of the foregoing, it will be apparent that I haveprovided a very simple, cheap and economical form of-process and bleaching liquor produced therefrom which will effectively serve the purposes intended.

Having thus described my invention what I claim 1s 1. A bleaching liquid containing chloride of lime, sodium carbonate, sodium bisulphite and sodium acetate.

2. A bleaching liquid comprising a bleach, sodium carbonate and sodium bisulphite.

3. A bleaching liquid comprising a bleach, sodium carbonate, sodium bisulphite and sodium acetate.

4. A bleaching'liquid containing water, chloride of lime, sodium salts and sodium acetate.

5. A process of producing a bleaching liquid consisting in adding to a quantity of cold water, a quantity of chloride of lime, stirring the mixture, adding a. quantity of sodium carbonate, mixing the same and adding hot water to 'raisethe temperature, allowing the same to stand after thoroughly dissolving the chloride of lime and sodium carbonate and then cooling the same.

6. A process of producing a bleaching It will also take out colors that have liquid consisting in adding to a quantity of cold water, a quantity of chloride of lime adapted to give off chlorine gases, stirring.

the mixture, adding a quantity of sodium carbonate, mixing the same and adding hot water to raise the temperature, allowing th same to stand after thoroughly dissolving the chloride of lime and sodium. carbonate and then cooling the same, and then adding small quantities of sodium bisulphite and acetic acid.

7. A process of producing a bleaching liquid. consisting in combining the ingredients in substantially the proportions as follows: adding about five pounds of chloride of lime to about two'or three gallons of cold water, stirring the same to dissolve the chloride of lime, adding about ten pounds of sodium carbonate, and mixing the same into a' paste so as to dissolve in such relatlvely small amounts of cold water the lumps of chloride of lime, adding hot water to raise the temperature to about from 150 to 180 and above 120 until the solution becomes caked and is thereby prevented from turning green and breaking to produce a softener for water or soft bleach, and then adding the remaining quantity of cold water to lower the temperature to about 7 0, thereby avoiding the escape of the chlorine gases by preventing loss and decomposition of the volatile acid.

8. A process of preparing a bleaching liquid consisting of adding to water, a quantity of chloride of lime, a quantity of sodiulln carbonate, sodium bisulphite and acetic aci 9. A process of producing a bleaching liquid consisting in combining the ingredients in substantially the following proportions and manner: taking two gallons of cold water and adding thereto five pounds of chloride of lime stirring said mixture until the chloride of lime is thoroughly dissolved, addingten pounds of sodium carbonate and stirring to form a paste, dissolving the paste in hot water, enough hot water being added to raise the temperature until the solution turns pink, adding cold water to make the solution up to ten gallons and lowering the temperature to 70 F; to avoid the escape of chlorine gas and retard the decomposition of the volatile acid, then adding four ounces of sodium bisulphite and four ounces of acetic acid. 

